Based on Coulomb's law

Asked by  | 18th Apr, 2008, 12:16: PM

Expert Answer:

electron stops due to repulsion as  it reaches the plate, that is its kinetic  energy will convert to its potential energy. and  its kinetic energy is  100eV

that is 1001.610-19=1.610-17 joules.

as electron reached near to the  plate then its kinetic energy will fully convert into the  potential energy which is

kq1q2/r     

Here the area of the plate is not given only surface charge density is given.

Answered by  | 18th Apr, 2008, 01:06: PM

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